The DrupalCon talk was only an hour, so wasn't nearly long enough to walk through the actual steps involved in each API. However! Thanks to the magic of Git (and particularly git rebase -i ;)), you can actually step through each step in the porting process.

Note: This is accurate now, but not necessarily tomorrow or especially not next week. ;) Nevertheless, I hope this is able to help someone out there get involved in Drupal core! :) There's a global sprint happening tomorrow!